INCOME TAXES NOL and tax credit carryforwards (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($)
Federal.
Operating Loss Carryforwards
Net operating loss carryforwards	$ 157.9
Federal. | Minimum
Operating Loss Carryforwards
Expiration date	Jan. 01, 2026
Federal. | Maximum
Operating Loss Carryforwards
Expiration date	Dec. 31, 2036
State
Operating Loss Carryforwards
Net operating loss carryforwards	$ 194.5
State | Minimum
Operating Loss Carryforwards
Expiration date	Jan. 01, 2017
State | Maximum
Operating Loss Carryforwards
Expiration date	Dec. 31, 2036
Foreign
Operating Loss Carryforwards
Net operating loss carryforwards	$ 2.7
Expiration date	Jan. 01, 2017
Tax credit carryforward	$ 9.6
Foreign | Minimum
Operating Loss Carryforwards
Expiration date	Jan. 01, 2017
Foreign | Maximum
Operating Loss Carryforwards
Expiration date	Dec. 31, 2026